PHP Manual
intl
The IntlCalendar class

The IntlCalendar class

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

Introduction

Class synopsis

class IntlCalendar {

/* Constants */

const int FIELD_ERA = 0;

const int FIELD_YEAR = 1;

const int FIELD_MONTH = 2;

const int FIELD_WEEK_OF_YEAR = 3;

const int FIELD_WEEK_OF_MONTH = 4;

const int FIELD_DATE = 5;

const int FIELD_DAY_OF_YEAR = 6;

const int FIELD_DAY_OF_WEEK = 7;

const int FIELD_DAY_OF_WEEK_IN_MONTH = 8;

const int FIELD_AM_PM = 9;

const int FIELD_HOUR = 10;

const int FIELD_HOUR_OF_DAY = 11;

const int FIELD_MINUTE = 12;

const int FIELD_SECOND = 13;

const int FIELD_MILLISECOND = 14;

const int FIELD_ZONE_OFFSET = 15;

const int FIELD_DST_OFFSET = 16;

const int FIELD_YEAR_WOY = 17;

const int FIELD_DOW_LOCAL = 18;

const int FIELD_EXTENDED_YEAR = 19;

const int FIELD_JULIAN_DAY = 20;

const int FIELD_MILLISECONDS_IN_DAY = 21;

const int FIELD_IS_LEAP_MONTH = 22;

const int FIELD_FIELD_COUNT = 23;

const int FIELD_DAY_OF_MONTH = 5;

const int DOW_SUNDAY = 1;

const int DOW_MONDAY = 2;

const int DOW_TUESDAY = 3;

const int DOW_WEDNESDAY = 4;

const int DOW_THURSDAY = 5;

const int DOW_FRIDAY = 6;

const int DOW_SATURDAY = 7;

const int DOW_TYPE_WEEKDAY = 0;

const int DOW_TYPE_WEEKEND = 1;

const int DOW_TYPE_WEEKEND_OFFSET = 2;

const int DOW_TYPE_WEEKEND_CEASE = 3;

const int WALLTIME_FIRST = 1;

const int WALLTIME_LAST = 0;

const int WALLTIME_NEXT_VALID = 2;

/* Methods */

private __construct()

public add(int $field, int $value): bool

public after(IntlCalendar $other): bool

public before(IntlCalendar $other): bool

public clear(?int $field = null): bool

public static createInstance(IntlTimeZone|DateTimeZone|string|null $timezone = null, ?string $locale = null): ?IntlCalendar

public equals(IntlCalendar $other): bool

public fieldDifference(float $timestamp, int $field): int|false

public static fromDateTime(DateTime|string $datetime, ?string $locale = null): ?IntlCalendar

public get(int $field): int|false

public getActualMaximum(int $field): int|false

public getActualMinimum(int $field): int|false

public static getAvailableLocales(): array

public getDayOfWeekType(int $dayOfWeek): int|false

public getErrorCode(): int|false

public getErrorMessage(): string|false

public getFirstDayOfWeek(): int|false

public getGreatestMinimum(int $field): int|false

public static getKeywordValuesForLocale(string $keyword, string $locale, bool $onlyCommon): IntlIterator|false

public getLeastMaximum(int $field): int|false

public getLocale(int $type): string|false

public getMaximum(int $field): int|false

public getMinimalDaysInFirstWeek(): int|false

public getMinimum(int $field): int|false

public static getNow(): float

public getRepeatedWallTimeOption(): int

public getSkippedWallTimeOption(): int

public getTime(): float|false

public getTimeZone(): IntlTimeZone|false

public getType(): string

public getWeekendTransition(int $dayOfWeek): int|false

public inDaylightTime(): bool

public isEquivalentTo(IntlCalendar $other): bool

public isLenient(): bool

public isSet(int $field): bool

public isWeekend(?float $timestamp = null): bool

public roll(int $field, int|bool $value): bool

public set(int $field, int $value): bool

public set(
    int $year,
    int $month,
    int $dayOfMonth = NULL,
    int $hour = NULL,
    int $minute = NULL,
    int $second = NULL
): bool

public setFirstDayOfWeek(int $dayOfWeek): bool

public setLenient(bool $lenient): bool

public setMinimalDaysInFirstWeek(int $days): bool

public setRepeatedWallTimeOption(int $option): bool

public setSkippedWallTimeOption(int $option): bool

public setTime(float $timestamp): bool

public setTimeZone(IntlTimeZone|DateTimeZone|string|null $timezone): bool

public toDateTime(): DateTime|false

}

Predefined Constants

IntlCalendar::FIELD_ERA

Calendar field numerically representing an era, for instance 1 for AD and 0 for BC in the Gregorian/Julian calendars and 235 for the Heisei (平成) era in the Japanese calendar. Not all calendars have more than one era.

IntlCalendar::FIELD_YEAR

Calendar field for the year. This is not unique across eras. If the calendar type has more than one era, generally the minimum value for this field will be 1.

IntlCalendar::FIELD_MONTH

Calendar field for the month. The month sequence is zero-based, so January (here used to signify the first month of the calendar; this may be called another name, such as Muharram in the Islamic calendar) is represented by 0, February by 1, …, December by 11 and, for calendars that have it, the 13th or leap month by 12.

IntlCalendar::FIELD_WEEK_OF_YEAR

Calendar field for the number of the week of the year. This depends on which day of the week is deemed to start the week and the minimal number of days in a week.

IntlCalendar::FIELD_WEEK_OF_MONTH

Calendar field for the number of the week of the month. This depends on which day of the week is deemed to start the week and the minimal number of days in a week.

IntlCalendar::FIELD_DATE

Calendar field for the day of the month. The same as IntlCalendar::FIELD_DAY_OF_MONTH, which has a clearer name.

IntlCalendar::FIELD_DAY_OF_YEAR

Calendar field for the day of the year. For the Gregorian calendar, starts with 1 and ends with 365 or 366.

IntlCalendar::FIELD_DAY_OF_WEEK

Calendar field for the day of the week. Its values start with 1 (Sunday, see IntlCalendar::DOW_SUNDAY and subsequent constants) and the last valid value is 7 (Saturday).

IntlCalendar::FIELD_DAY_OF_WEEK_IN_MONTH

Given a day of the week (Sunday, Monday, …), this calendar field assigns an ordinal to such a day of the week in a specific month. Thus, if the value of this field is 1 and the value of the day of the week is 2 (Monday), then the set day of the month is the 1st Monday of the month; the maximum value is 5.

Additionally, the value 0 and negative values are also allowed. The value 0 encompasses the seven days that occur immediately before the first seven days of a month (which therefore have a ‘day of week in month’ with value 1). Negative values starts counting from the end of the month – -1 points to the last occurrence of a day of the week in a month, -2 to the second last, and so on.

Unlike IntlCalendar::FIELD_WEEK_OF_MONTH and IntlCalendar::FIELD_WEEK_OF_YEAR, this value does not depend on IntlCalendar::getFirstDayOfWeek() or on IntlCalendar::getMinimalDaysInFirstWeek(). The first Monday is the first Monday, even if it occurs in a week that belongs to the previous month.

IntlCalendar::FIELD_AM_PM

Calendar field indicating whether a time is before noon (value 0, AM) or after (1). Midnight is AM, noon is PM.

IntlCalendar::FIELD_HOUR

Calendar field for the hour, without specifying whether itʼs in the morning or in the afternoon. Valid values are 0 to 11.

IntlCalendar::FIELD_HOUR_OF_DAY

Calendar field for the full (24h) hour of the day. Valid values are 0 to 23.

IntlCalendar::FIELD_MINUTE

Calendar field for the minutes component of the time.

IntlCalendar::FIELD_SECOND

Calendar field for the seconds component of the time.

IntlCalendar::FIELD_MILLISECOND

Calendar field the milliseconds component of the time.

IntlCalendar::FIELD_ZONE_OFFSET

Calendar field indicating the raw offset of the timezone, in milliseconds. The raw offset is the timezone offset, excluding any offset due to daylight saving time.

IntlCalendar::FIELD_DST_OFFSET

Calendar field for the daylight saving time offset of the calendarʼs timezone, in milliseconds, if active for calendarʼs time.

IntlCalendar::FIELD_YEAR_WOY

Calendar field representing the year for week of year purposes.

IntlCalendar::FIELD_DOW_LOCAL

Calendar field for the localized day of the week. This is a value between 1 and 7, 1 being used for the day of the week that matches the value returned by IntlCalendar::getFirstDayOfWeek().

IntlCalendar::FIELD_EXTENDED_YEAR

Calendar field for a year number representation that is continuous across eras. For the Gregorian calendar, the value of this field matches that of IntlCalendar::FIELD_YEAR for AD years; a BC year y is represented by -y + 1.

IntlCalendar::FIELD_JULIAN_DAY

Calendar field for a modified Julian day number. It is different from a conventional Julian day number in that its transitions occur at local zone midnight rather than at noon UTC. It uniquely identifies a date.

IntlCalendar::FIELD_MILLISECONDS_IN_DAY

Calendar field encompassing the information in IntlCalendar::FIELD_HOUR_OF_DAY, IntlCalendar::FIELD_MINUTE, IntlCalendar::FIELD_SECOND and IntlCalendar::FIELD_MILLISECOND. Range is from the 0 to 24 * 3600 * 1000 - 1. It is not the amount of milliseconds elapsed in the day since on DST transitions it will have discontinuities analog to those of the wall time.

IntlCalendar::FIELD_IS_LEAP_MONTH

Calendar field whose value is 1 for indicating a leap month and 0 otherwise.

IntlCalendar::FIELD_FIELD_COUNT

The total number of fields.

IntlCalendar::FIELD_DAY_OF_MONTH

Alias for IntlCalendar::FIELD_DATE.

IntlCalendar::DOW_SUNDAY

Sunday.

IntlCalendar::DOW_MONDAY

Monday.

IntlCalendar::DOW_TUESDAY

Tuesday.

IntlCalendar::DOW_WEDNESDAY

Wednesday.

IntlCalendar::DOW_THURSDAY

Thursday.

IntlCalendar::DOW_FRIDAY

Friday.

IntlCalendar::DOW_SATURDAY

Saturday.

IntlCalendar::DOW_TYPE_WEEKDAY

Output of IntlCalendar::getDayOfWeekType() indicating a day of week is a weekday.

IntlCalendar::DOW_TYPE_WEEKEND

Output of IntlCalendar::getDayOfWeekType() indicating a day of week belongs to the weekend.

IntlCalendar::DOW_TYPE_WEEKEND_OFFSET

Output of IntlCalendar::getDayOfWeekType() indicating the weekend begins during the given day of week.

IntlCalendar::DOW_TYPE_WEEKEND_CEASE

Output of IntlCalendar::getDayOfWeekType() indicating the weekend ends during the given day of week.

IntlCalendar::WALLTIME_FIRST

Output of IntlCalendar::getSkippedWallTimeOption() indicating that wall times in the skipped range should refer to the same instant as wall times with one hour less and of IntlCalendar::getRepeatedWallTimeOption() indicating the wall times in the repeated range should refer to the instant of the first occurrence of such wall time.

IntlCalendar::WALLTIME_LAST

Output of IntlCalendar::getSkippedWallTimeOption() indicating that wall times in the skipped range should refer to the same instant as wall times with one hour after and of IntlCalendar::getRepeatedWallTimeOption() indicating the wall times in the repeated range should refer to the instant of the second occurrence of such wall time.

IntlCalendar::WALLTIME_NEXT_VALID

Output of IntlCalendar::getSkippedWallTimeOption() indicating that wall times in the skipped range should refer to the instant when the daylight saving time transition occurs (begins).

IntlCalendar::add — Add a (signed) amount of time to a field
IntlCalendar::after — Whether this objectʼs time is after that of the passed object
IntlCalendar::before — Whether this objectʼs time is before that of the passed object
IntlCalendar::clear — Clear a field or all fields
IntlCalendar::__construct — Private constructor for disallowing instantiation
IntlCalendar::createInstance — Create a new IntlCalendar
IntlCalendar::equals — Compare time of two IntlCalendar objects for equality
IntlCalendar::fieldDifference — Calculate difference between given time and this objectʼs time
IntlCalendar::fromDateTime — Create an IntlCalendar from a DateTime object or string
IntlCalendar::get — Get the value for a field
IntlCalendar::getActualMaximum — The maximum value for a field, considering the objectʼs current time
IntlCalendar::getActualMinimum — The minimum value for a field, considering the objectʼs current time
IntlCalendar::getAvailableLocales — Get array of locales for which there is data
IntlCalendar::getDayOfWeekType — Tell whether a day is a weekday, weekend or a day that has a transition between the two
IntlCalendar::getErrorCode — Get last error code on the object
IntlCalendar::getErrorMessage — Get last error message on the object
IntlCalendar::getFirstDayOfWeek — Get the first day of the week for the calendarʼs locale
IntlCalendar::getGreatestMinimum — Get the largest local minimum value for a field
IntlCalendar::getKeywordValuesForLocale — Get set of locale keyword values
IntlCalendar::getLeastMaximum — Get the smallest local maximum for a field
IntlCalendar::getLocale — Get the locale associated with the object
IntlCalendar::getMaximum — Get the global maximum value for a field
IntlCalendar::getMinimalDaysInFirstWeek — Get minimal number of days the first week in a year or month can have
IntlCalendar::getMinimum — Get the global minimum value for a field
IntlCalendar::getNow — Get number representing the current time
IntlCalendar::getRepeatedWallTimeOption — Get behavior for handling repeating wall time
IntlCalendar::getSkippedWallTimeOption — Get behavior for handling skipped wall time
IntlCalendar::getTime — Get time currently represented by the object
IntlCalendar::getTimeZone — Get the objectʼs timezone
IntlCalendar::getType — Get the calendar type
IntlCalendar::getWeekendTransition — Get time of the day at which weekend begins or ends
IntlCalendar::inDaylightTime — Whether the objectʼs time is in Daylight Savings Time
IntlCalendar::isEquivalentTo — Whether another calendar is equal but for a different time
IntlCalendar::isLenient — Whether date/time interpretation is in lenient mode
IntlCalendar::isSet — Whether a field is set
IntlCalendar::isWeekend — Whether a certain date/time is in the weekend
IntlCalendar::roll — Add value to field without carrying into more significant fields
IntlCalendar::set — Set a time field or several common fields at once
IntlCalendar::setFirstDayOfWeek — Set the day on which the week is deemed to start
IntlCalendar::setLenient — Set whether date/time interpretation is to be lenient
IntlCalendar::setMinimalDaysInFirstWeek — Set minimal number of days the first week in a year or month can have
IntlCalendar::setRepeatedWallTimeOption — Set behavior for handling repeating wall times at negative timezone offset transitions
IntlCalendar::setSkippedWallTimeOption — Set behavior for handling skipped wall times at positive timezone offset transitions
IntlCalendar::setTime — Set the calendar time in milliseconds since the epoch
IntlCalendar::setTimeZone — Set the timezone used by this calendar
IntlCalendar::toDateTime — Convert an IntlCalendar into a DateTime object